I purchased a LogBellex BX-50NE cartridge many years ago and have just recently purchased a BX-im7 NOS cartridge.
These vintage Japanese cartridges are far less well known than the Shures, Stantons, Ortofons, ADCs etc of the day.
For that reason, I have attached some literature that may be of use to anyone owning or looking at such a cartridge.
My BX-im7 unit came with an original December 1980 shipping note, indicating it was an "evaluation sample".
Despite the fact that I purchased my BX-50NE later in 1983 from Radio Parts in Melbourne. (AU$33 at the time). I believe the BX-im series to be a later series than the BX-50.
Replacement elliptical & conical stylus can be found for the BX-50 series from the usual suppliers.
I've yet to establish if these are interchangeable with the BX-im series.
I hope this is of use to someone, as there is very little information out there for these old cartridges.
Lastly, I understand that MC cartridges were also made by LogBellex but I have not researched those cartridges.